Willian, 29, started Saturday's Wembley final on the bench but emerged in stoppage-time and exchanged pleasantries with Jose Mourinho as he prepared to come on. The two also embraced before kick-off.

Mourinho brought Willian to Chelsea in 2013 from Anzhi Makhachkala and is keen on reuniting with the Brazil international, who is contracted to the Stamford Bridge club until 2020.

As Willian walked through the mixed zone following Chelsea's 1-0 win, he told reporters asking to speak with him: "I have to go."

In a recent interview with ESPN Brasil, Willian was asked to discuss his relationship with Chelsea coach Antonio Conte and said: "Oh boy! Do you really want me to tell you. Let's save that one for the next interview."

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Willian is represented by Kia Joorabchian, who United have not dealt with since Carlos Tevez left the club in 2009. Although Mourinho indicated he has no intention of making attacking additions this summer he is prepared to make an exception for Willian.

The United attack is devoid of a right wing specialist, with Jesse Lingard and Juan Mata more productive through the middle, while Marcus Rashford and Anthony Martial have struggled to perform there.

Willian turns 30 in December and is viewed as an ideal option to bridge the gap between academy talent Tahith Chong graduating from the Under-23s into the first-team squad.